Well, to be fair to dear old Ken, about everyone - BCSE members included.

Did our arms and legs evolve from shark gills? Human limbs share a gene with fishy body part according to study that may prove a discredited Victorian theory

Idea was proposed more than a century ago that limbs evolved from gills Experts have shown human limbs share a gene with cartilaginous fish gills Discovery could shed light on the origin of jawed vertebrate, like humans